dateFormat = function (date, format) {
  date = new Date(date);
  var o = {
      'M+' : date.getMonth() + 1, //month
      'd+' : date.getDate(), //day
      'H+' : date.getHours()+8, //hour+8小时
      'm+' : date.getMinutes(), //minute
      's+' : date.getSeconds(), //second
      'q+' : Math.floor((date.getMonth() + 3) / 3), //quarter
      'S' : date.getMilliseconds() //millisecond
  };
  if (/(y+)/.test(format))
      format = format.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));

  for (var k in o)
      if (new RegExp('(' + k + ')').test(format))
          format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ('00' + o[k]).substr(('' + o[k]).length));

  return format;
}
